Double-action lubricant compressor



Fel. 11, 1930. E; PIQUEREZ 1,746,504

DOUBLE ACTION LUBRICANT COMPRESSOR Fild April 15, 1925 2 sneetsfsneet 1Feb. 11', 1930. l E. PlQUEREz i 1,746,604

' DOUBLE ACTION LUBRICANT COMPRESSOR Filed April :L5l 1925 2sheets-sheet 2 4 32 I 27g, @a/enfer maze Hu/ef'rcz.

lilratented Feb. 11, 1930 y UNITED s-TA EMILE PIQUEREZ, F PARIS,

'ras 'Parr-:NTI oFFlcr.

FRANCE, ASSIGNOB T0 ALEMITE CORE'QBATION, 0F CHICAGO; ILLINOIS, ACGRPORATION 0F DELAWARE l D-OUBL-ACTION LUBBICANT COMPBESSGB f Appncauonmed prix 15, 1925, serial 1ro. 23,351, aim i This invention relates toforce fed lubrication and more specifically to an improved dispensingdevice for use in such lubrication.

Among the primary objects of the invention may be enumerated thedelivery of lubricant at moderate pressure in relatively largeuantities, or in smaller quantities at a much igher pressure, the changefrom one form of discharge to the stantaneously by a simple manipulationof the device.

The embodiment for delivering any liquid, body such as grease, oil,petroleum jelly, gasoline, etc., kept in changeable reservoirsubstantially attached to the body of the device'. Thus the combinationpermits use ofy the apparatus to inject different liquids at will bysimply replacing the reservoir, which can be done in an instant.

Thus the invention the structure of the compressor and its particularcombination with a removable reservoir suitable for all lubricating andcleanin uses. particularly' adapted for use with the com- 'dge forfeeding the disclosed is also adapted pressor as a refill cartri same. p

Inv the accompanying drawings Fig. 1 is a longitudinal section of acompressor adapted to discharge either'at moderate or at very highpressure. FFig. 2 is a cross section on line 2 2 of lglig. 3 is alongitudinal section of a simplified compressor discharging at moderatepressure only.

Fig. 4 is a fragmentary elevation of the pump body showing the operatingplunger and its handle.

Fig. 5-is a fragmentary longitudinal sectionof the reservoir employed inconnection with a li uid such as oil.

Fig. 6 1s a transverse section of the reservoir plug.

In the embodiment of the invention selectedv for villustration inFigs. 1and 2, the pump body 1 is provided with a bore 2 for receiving theoperating rod 3 of piston 4, moy- 50 able in compression cylinder 5formed 1n other being made inviscous or plastic includes, particularly,`

It also involves, the reservoir itself,

the bore 2.

portion is limited by n France June 18, 1924.

body 1 between bore 2 and the discharge pas-1 sage 6.'

,An inlet passage being suitably inclined able lubricant reservoir 7opens into cylinder 5,

to receive the remov- 8 fastenedV to the tube 7 by a suitable tightfastening such as a threaded joint, a bayonet slot reservoir is providedwith ably attached as by means o to a cover 11, threaded or on the4reservoir 8, s

with an air vent 11a.

Body 1 is provided with an enlargement 12, split intotwo pieces aremovable and 1nter- The fixed portion v 'oint, etc. The a ollower 9suitf a small chain 10 suitably attached aid cover being 1a and 1b. (SeeFig. 2.) 1, integral with body 1,

carries two bolts 13, fastened as by a threaded connection and guidingthe piece 1", which is normally held free end and a threa centric so asnot to drical seatin body by spring 14 in the out of contact by springs14) entering formed in sections 1 and centric with bolts 13.

The control rod 3 c the periphery of the Rod 3 can, ltherefore,

with rod 3 sockets 15 and 16 1b respectively, conarries handle 17 at itsded portion 3 formed ecproect from one side of ro as shown in Fig. 2.slide freely in its cylin- 1 when section 1b is held 'position of Fig.2. lSection 1b is threaded to fit the threads on rod 3, and has aprojection 18 for operating the same. Inits outermost position the upperthread of the `threaded portion 3l abuts a split ring 19 seated ingroove The other en 21, and the 2O in the end of d of the threadedabutment with packing bottom of cylinder 2, said packing beingcompressed into its seat to hold it in place.

Valve means such as ball valve 22 pressed against opening 23 ofdiaphragm 24, threaded to the bottom bearing on another of passage 6, byspring 25 diaphragm 26 similarly threaded in place, prevents return flowinto compression cylinder 5.

` The operation is as follows:

Assume that the c ompressor 1s to be used to inject grease fromreservoir 8 in considerable quantities at mo der handle 17 developsgrease through con ate pressure. A pull on suction and draws the duit 7to fill cylinder 5.

provided The subsequent down stroke of handle 17 and piston 4 compressesthe lubricant in cylinder 5 to force it past ball .valve 22 intodelivery assage 6. The operation can be continued y reciprocation ofpiston like the piston of a s inge.

f, however, the lubricant must be discharged under high pressure, aswill be the case whenever the resistance to the passage of lubricantinto the parts to .be lubricated is too great to permit operation of thepiston by rectilinear displacement, the deve opment of ressure by thescrew thread is available. T us a pressure of the thumb on boss 18 withthe hand holding the body will draw section 1h into engagement with thethreads on the rod. Handle 17 is now rotated to lift the piston toproduce the necessary suction to draw lubricant into cylinder 5. Byrotating in the opposite direction the piston is forced down and thelubricant forced out through opening 23.

The very high discharge pressure thus ob tained can overcome the highresistance of the lubricant, and when this resistance is once brokendown, the ordinary method of reciprocating the piston may be employed,for further-injection.

In the simplified embodiment of Figs. 3 and 4 the device is onlyrequired to discharge against moderate pressure. Movement of piston 4 isby means of handle 17 as before, while its return movement is producedby spring 27 encircling rod 3 and having its two end coils seated inannular grooves 28 and 29 formed in body 1 and rod 3 respectively.

The fastenin at both ends provides a. resilient limit Ier the outwardmovement of the piston, and at the same time permits very easy assemblyand separation of the parts. Two arms 30 are also provided at the upperend of the body 1 for convenience in manipulating handle 17. In thisembodiment ball 22 bears on a seat formed directly in the body 1 at theend of cylinder 5.

For better mounting of reservoir 8 on the intake passage 7 of the pumpbody, there is illustrated a nipple joint with packing 31 co-operatingwith the threaded neck of passage 7. This construction also facilitatesa tight closure of reservoir 8 when it is removed froin the pump bodyand covered by a threaded cap.

The operation is as in the previous embodiment when discharging undermoderate pressure. Due to the long stroke and small section of piston,the discharge pressure will still be relatively high.

It'will be understood that leither embodiment will be employed inconnection with a plurality of reservoirscontaining different materials,which reservoirs can be mou ted in succession on thecompressor as 'req'1red to permit the use of the different mat ials, as algyive set forth.In using liquids such as iluidoil, gasoline, etc., the follower 9 can beomitted as indicated in Fig. 5, in which case the opening in cover 11 ispreferabl closed by a threaded plug 32 provided witliv a longitudinalgroove 33. The plug can be temporarily unscrewed to provide an air ventand thestop 34 revents loss of same.

Without furt er elaboration the foregoing will so fully explain thegistof the invention, that others may by applying current knowledge, readilya apt the saine for use under various conditions of service. It will forinstance be observed that the lubricant reservoirs could be simple tubesof foil or yieldable material with closed bodies and threaded necks forengaging the bod In this connection the follower can a so be omitted andthe tube will collapse under the suction of the pump. This and manyother adaptations and modifications may readil be made by those skilledin the artfwithout eliminating certain features which may properly besaid to constitute the essential items of novelty involved, which itemsare intended to be defined and secured by the following claims.

What I claim is:

1. A lubricant compressor comprising a pump bodly, a plunger therein,means normally gui ing said plunger in reciprocating movement, andadditional means normall inoperative for guiding said plunger in helicalmovement, said additional means being positioned to be convenientlymoved into operative position by one of the digits of the hand holdingthe body.

2. A lubricant compressor comprising a pump body, a plunger including astemeccen tric threads carried by said stem, means for guiding thethreaded part of said stem for straight reciprocating motion, and meansfor guiding the threaded part of said stein in helical movement, saidmeans being positioned to be conveniently moved into operative ositionby one of the digits of the hand holding the body.

3. A lubricant compressor com rising a pump body having a discharge en acheck valve at said discharge en d, an inlet for said pump lying at anangle to the body and slanting away from the discharge end, a lubricantreservoir co-axial with said inlet and detachably mounted thereon, saidreservoir serving to maintain lubricant therein at substantiallyatmospheric pressure, a plunger reciprocable inthe pump body, screwthreads on said plunger, gui e means permitting sliding movement of saidplunger without rotation, threaded means movable into and out ofengagement with the threads of said plunger, and resilient means tendingto move said threaded means into disengaged position.

In Witness whereof, I hereunto subscribe my name, this 23rd day ofMarch, 1925.

EMILE PIQUEREZ.

Yes

